diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c
index 0fa38f3..36f2aca 100644
--- a/ffmpeg_opt.c
+++ b/ffmpeg_opt.c
@@ -820,6 +820,12 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
         default:
             abort();
         }
+
+        ret = avcodec_parameters_from_context(par, ist->dec_ctx);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing the decoder context.\n");
+            exit_program(1);
+        }
     }
 }